Designer Stella McCartney uploaded a vintage-filtered photo to Instagram on Wednesday, which shows the 40-year-old actress jumping for joy in a teeny, python-print bikini made by the designer. Stella camptioned the pic, "Sexy lady in Stella swimwear! Summer never stop! x Stella."

We have to admit, Gwynnie looks pretty amazing in the makeup free, stripped-down pic. Her bikini bod, of course, isn't bad either, but did we really expect anything less from the famously-strict actress?

Paltrow reportedly works out for two hours a day to stay fit, and she's even admitted to trying a number of eyebrow-raising diets in the past, including the Master Cleanse, which she said left her hallucinating for 10 days.